William j



(N0 Model.)

I W. J. KEEP.

VENTILATING STOVE.

No. 375,369. Patented Dec. 27, 1887.

N. PETERS. Pholu-Lilhogrnphcr. .Vashi n nnnnn c,

UNITED STATES PATENT OFFICE.

WILLIAM J. KEEP, OF DETROIT, MICHIGAN, ASSIGNOR TO THE MICHIGAN STOVE COMPANY, OF SAME PLACE.

VENTI LATlNG-STOVE.

SPECIFICATION forming part of Letters Patent No, 375,359, dated December 27, 1887.

Application filed March 2-2, 1887. Serial No. 231,964. (No model.)

To all whom it may concern:

Be it known that I. VILLIAM J. KEEP, a citizen of the United States, residing at De troit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in VentilatingStoves, of

which the following is aspecification, reference being had thercinto the accompanying drawings, in which- Figure 1 represents a perspective view of a stove constructed according to my invention; Fig. 2, a horizontal section through the line a: 00,- Figs. 3, 4, 5, 6, 7, and 8 are details that will be more fully described hereinafter.

This improvement relates, mainly, to ventilating-stoves; and the invention consists in the construction, arrangement, and combination of parts, hereinafter more particularly described, and then more definitely'pointed out in the claims.

The accompanying drawings show my invention carried out on an ordinary sheet-iron round stove modified to suit my invention; but l do not intend to limit myself to this construction, as the stove may be made of any shape or material without departing from the spirit of my invention.

In said drawings, A represents the base, supported on legs B, as usual, having an ashpit, 0, closed by a door, D, having a hood, E, which may be provided with a damper, in

'deX, &c., similar to that shown and claimed in my application No. 227,806, filed February 16, 1887, which is designed to allow the cold air that lies nearest the floor to be taken up into the ash-pit, and to govern its admission thereto. From the base A the fire-pot casing F rises and supports a ring, G, that carries the sheet-metal jacket H, above which is the top I, of any suitable form, either ornamented or plain. Between the base A and ringG are two flues, J K, formed in any suitable manner, but preferably by attaching plates to the outside of the fire-pot or casing, which flues communicate through holes in the ring Gwith other fines, L M, that partially surround the door N, and the walls of which preferably form the frame of the doorway thereof. These flues may be formed in the manner shown in Fig. 2 by riveting castings on the face of the jacket; or they may be. formed in the frame of the doorway itself, as shown in Figs. 7 and 8. The upper endof the fiueLterminates in the openings Z; but the flue M terminates in an opening that allows the air to pass inside the stove, as shown in Fig. 3. The fine J is in communication through an opening in the base A with a tube, 0, the lower end of which is over an opening in the floor that forms one end of a passage (shown in dotted lines) under the floor, and whose other end is in connection with the outside air. At thelower end of this pipe, and at one side thereof, is an opening, 0, that is ordinarily closed by a gate, P, which, however, can be turned down, as shown in dotted lines, so as to shut off the outside air and admit that from the room.

Between the bottom of the ash-pit and the base A there is a sliding box or valve, Q, having in its top an opening, q, and in its bottom another opening, g, which openings, when the valve is pushedto the left, as in Figs. 3 and 4, register, respectively, with the opening in the base under the fiue K, and with an opening, 0, in the bottom of the ash'pit. (Shown in dotted lines in Figs. 3 and 6.) When the valve is moved to the left, as shown in Figs. 5

and 6, the bottom of the box covers the open-- ing 0, and the opening-in the base A under the flue K is uncovered, thus leaving said flue K and the ash-pit in full communication with each other and with the inside of the stove above the fire.

From the above description the operation will be obvious and hardly needs a detailed description, and it will therefore sutfice to say that as air enters the flues J L from the outer atmosphere it becomes heated and lighter, and thus rises through the openings Zinto the room, and up to the upper part of the room, displacing the cold air there, which, being the heaviest, descends to the floor and is drawninto the fire through the opening in the ash pit door. A'ny cold air which may comeinto the room through an open door will, owing to its greater gravity, also descend to the floor, and will be drawn through the ash-pit into the fire to support combustion.

When the valve Q is in the position shown in Figs. 3 and 4, the air from the room will pass up through the fines K M into the stove above the fire, as shown by the arrows, and

thus the cold air from the floor will be rapidly drawn away. Vhen the valve Q is set to the 1eft,,as shown in Figs. 5 and 6, any air that may leak into the ash-pit through the crevices, instead of passing through the fire, will take the path of least resistance and pass into the stove above the fire through the tines K M, and thus check the fire.

From the above description it will be seen that the ventilation of the room is under perfeet control, and that I obtain the largest amount of ventilation and warmth with the least amount of fuel, as the very coldest air is always drawn away from the lloor to feed the fire, while the pure air from the outside is heated as it passes into the room, instead of entering the room in the form of cold drafts through crevices in the doors and windows, as is usual with the stoves ordinarily employed.

Having thus set forth one way of carrying out my improvement, but without limiting myself to the construction shown, I claim 1. Astovehavingafluecommunicatingwith the same above the fire-pot at one end and with the ash-pit and the outer air at the other end, in combination with a valve for controlling the inflow of air to said line from either the ash-pit or the outer air, substantially as described.

2. The combination, with a stove-casing, of a door-frame attached thereto and formed with external air-fines having openings above and below for the ingress and'egress of the air, substantially as described.

3. The combination, with a stove and the casing thereof, of a doorway-frame constructed to form two passages parallel with said casing, one of which forms a pure-air heater and communicates with the air in the room at each end, and the other a foul-air flue communicating with the fire-chamber and provided with an ingress-opening at a point below its egressopening, substantially as described.

4. The combination, with a stove and with the casing thereof, of adoorway-frame having passages on each side parallel with the casing, and suitable ingress and egress openings, one

communicating with the room or external atmosphere, as desired, and the other with the room and ash-pit, and valves for controlling the admission of air to one of said fines from the room or the ash-pit and the other flue from the room or external atmosphere, substantially as described.

5. As a new article of manufacture, a stovedoor frame formed with vertical lines, the upper end of one flue terminating in the openings l and the other adapted to communicate with an opening in the wall of the stove, and both provided with suitable openings to admit the air, and adapted to serve as and for the purpose specified.

6. The combination, in a stove, of an air flue connnunicating with the fire-chamber, a base, A, having an opening under said flue, an ash-pit, 0, having an opening through which air may pass into said line, with the valve Q, having corresponding openings and adapted to connect the line with the ash-pit or the room, as desired, substantially as described.

7. The combination, with the fire-pot casing and air-heating fines JK thereon, of thejacket and the doorframe attached thereto and providcd with lines L M, communicating with the tops of said fines J K, the flue L communicating with the air in the room and flue K commnnicating with the fire-chan'iber, as and for the purpose specified.

8. The combination, with the tirepot casing and air-heating fines J K, of the ring G, having openings communicating with said lines, the jacket, and the door-frame having airheating fines L M, eon'imui'iicating with the tines J K, the due L communicating with the air in the room and the flue M communicating with the interior of the jacket, substantially as and for the purpose specified.

In testimony whereof I affix my signature, in presence of two witnesses, this 18th day of March, 1887.

\VILLIAM J. KEEP.

\Vitnesses:

CHARLES W. KEMPT, FRANK L. BROMLEY. 

